removeNotifyListener method

Future<void> removeNotifyListener(
  1. Uuid service,
  2. Uuid characteristic,
  3. NotifyListener listener
)

移除通知监听

Implementation

Future<void> removeNotifyListener(
    Uuid service, Uuid characteristic, NotifyListener listener) async {
  String key = service.toString().toLowerCase() +
      "-" +
      characteristic.toString().toLowerCase();

  _NotifyData? notifyData;
  if (notifyMap.containsKey(key)) {
    notifyData = notifyMap[key]!;
  }
  if (notifyData == null) {
    return;
  }
  notifyData.removeListener(listener);
  //如果已经没有监听了，则清空之前的订阅
  if (notifyData.listenerLength == 0) {
    notifyMap.remove(key);
    await notifyData.streamSubscription?.cancel();
    if (Platform.isIOS) {
      //TODO IOS底层应该是有bug，cancel的停止没有等到，所以这里手动延时下，看之后如何从底层修改掉这个问题。
      await Future.delayed(const Duration(milliseconds: 200));
    }
  }
}